Mark boats from bark, a stick and a leaf
Leaf / feather
Pond / stream / puddle
Find a dead log with bark peeling off and carefully break off a piece. Use some mud to attach a light stick as a mast. A leaf, feather or thin piece of bark would make a great sail for your boat.
Find a puddle or small stream to float your boat in. If it sinks, try moving the mast and sail around on the bark.
Whose boat can travel across a puddle first? If it’s not very windy, try blowing your boats to make them sail faster.