Season Four included a jet powered kayak that saw 13-year-old Matt Drummond from tiny Takapau in the Hawkes Bay reach land speeds of up to fifty kilometres an hour.

Another fast invention was Maddison van Sitter's high powered fishing rod that used gunpowder and rocket power to send his bait hundreds of metres into the sea.

The Let's Get Inventin' team even produced a mechanical horse that could also neigh and pooh just like a real horse.

Let's Get Inventin' has a brand new Build Buddy this series - the multi talented Clinton Randell. Clinton describes Let's Get Inventin' as the one of the most challenging jobs he's ever done and the most fun. He's joined by Robotics engineer Chris Chitty back as the knowledgeable yet slightly off the wall character of Dr Robotech.

There was a road that plays Tiki Taane's number one hit Always on My Mind when you drive on it and a suction powered hair tier upper that puts your hair in a pony tail without using your hands thanks to Rachel Barker from New Plymouth. Luckily the Breakers Basketball cheerleaders' hair extensions survived that Goober Challenge.

At just eight years old, the youngest competitor Madalena Refiti from Auckland realized her dream of flying with the aid of a flying hat.

This year, with the help of New Zealand Trade and Enterprise, Let's Get Inventin' is in schools around the country teaching kids how to use their wild imaginations to think up new invention ideas.

Three of this season's episodes begin with a school invention workshop where one lucky inventor was chosen to have their idea realized in that episode. They   also competed in the final for the $10,000 Patent Prize Package.

From the ten inventions made in the series, AJ Park Patent attorneys identified unique ideas that are potentially patentable. From these, one clever young inventor Tyler Sykes from Great Barrier Island won the $10,000 Patent Prize package from AJ Park and the Icehouse Business Incubator. Tyler's new rat trap used girl rats to shock male rats to death! This gruesome invention saves the islands valuable bird life and returns the rats into the environment with no toxic poisons.

The Fonterra Milk Bottle Challenge was a runaway success. We gave away ten iPod Touch prizes live on Studio 2 with our winners appearing on TV with their inventions. Be watching episodes repeated on TVNZ6 and please join our Facebook page for more updates. Keep a look out for the new series in 2011!

EPISODE SYNOPSIS

EPISODE ONE

Sunday 14 February 2010 5.00 pm

Keen fisherman Maddison von Sitter from Rotorua experiments with rockets and gunpowder to fuel a high powered fishing rod dubbed the bait rifle.

The 11-year-old wanted to invent a fishing rod that would fire his fishing line far out to sea so he could catch lots of fish.

The Let's Get Inventin' team experimented with a rocket that fired his bait and line 400 miles out to sea and a high powered rifle fitted with a special bait grenade launcher to protect his bait. The fish didn't stand a chance.

EPISODE TWO

Sunday 21 February 2010 5.00 pm

Rachel Barker (14) from New Plymouth gives everyone a hair raising experience with her unique hands free hair tier-upper.

Her invention involved some very high powered suction and a device that tied up hair. Luckily the Breakers Basketball cheerleaders' hair extensions survived that Goober Challenge.

EPISODE FOUR

Sunday 7 March 2010 5.00 pm

At just eight years old, Madalena Refiti from Auckland was the youngest competitor with big ambitions to fly high, powered only by a hat.  This really tested the Let's Get Inventin' build team; special effects geniuses Blair Watkins and Harry Harrison, but they came up with an ingenious and impressive machine to realize her dream.

EPISODE FIVE

Sunday 14 March 2010 5.00 pm

Emily Cavell is a horse mad nine-year-old from Auckland who came up with an idea for a mechanical pony she can keep at home.  The horse was created using Dutch kinetic artist Theo Jansen's robot designs.

It was made extra realistic with the addition of neighing and even pooing mechanisms.

EPISODE SIX

Sunday 21 March 2010 5.00 pm

Great Barrier Island's Tyler Sykes has an eco friendly rat catcher to deal to the growing ship rat population there. His invention uses solar power to electrocute the rats which are threatening the island's  native bird population.

EPISODE SEVEN

Sunday 28 March 2010 5.00 pm

Johanna Nee Nee has come up with a cool new toy that combines a pogo stick, a water pistol and heaps of paint. The pressure from the bouncing pogo stick spurts paint and Johanna invented a game with teams of players from her school,Mission Heighs Junior College in East Auckland.

EPISODE EIGHT

Sunday April 4 2010 5.00 pm

12-year-old Matt Drummond from tiny Takapau in the Hawkes Bay wanted to power up his kayak with a jet so he could go super fast on both and water. A powerful pulse jet and some bike wheels saw his kayak reach speeds of 50 kph at Ardmore Aerodrome before he successfully launched it at the Orakei Basin and raced against Olympic Kayaker Steve Ferguson.

EPISODE NINE

Sunday April 11 2010 5.00 pm

Albert Todd's ambitious idea was a road that played a hit song when you drive over it.  The aim was to ensure that drivers were rewarded with a song every time they drove at the correct speed. The labour intensive device saw hundreds of foam filled hoses, tubes and  pipes used to produce Tiki Taane's number one hit Always On My Mind performed by a golf cart on a road.

EPISODE TEN

Sunday April 18 2010 5.00 pm

The final in which one young inventor wins the $10,000 prize package.  From the ten inventions made in the series, judges AJ Park Patent attorneys, the Icehouse Business Incubator and the inventor of the Martin JetPack Glenn Martin chose a winner.

The Eco Fiendly Rat Trap invented by Tyler Sykes from Great Barrier Island won the $10,000 Patent Prize package from AJ Park and the Icehouse Business Incubator. As a result Tyler now has two patents on the idea of using female rats to attract wild rats into a trap.