Outline: Something to make that boat simulator less boring. It can also be done in waist deep water.

1. Set up a boat on tyres. You don't need a mast.

2. Tie two strong ropes to the center mainsheet block, or whatever's handy in the middle of the boat. The easiest thing is to tie the mainsheet off at the block and use the two tail ends of the rope.

3. Two people hike out (one on either side duh) and battle to see who can hike the best or tip the boat towards them. Get thooe asses out.

4. For wave effects, get the other kids to throw a buckets of water at people and rock the boat fromt he front and back.

WARNING: Make sure you've some cusions for a soft landing when the person falls out.

MOAR WARNING: Make sure there's no tear or weak point on the straps. I did this with a friend of mine and of course we broke the strap. Luckily my head was already 5cm from the ground so we both rolled over laughing.