You can use any floating object for the base of the boat, such as a section of a swimming float or for short racing you could use a washing up sponge. For the mast you could use a stick and then attach a sail. For the sail the best option is to cut some paper into a right angle triangle (you can decorate it however you wish) and attach it to the mast. To make the boat move you must blow at it from a distance and not use your hands. If you bathe children together, they can race each other, if your child is in the bath you can race them and play together.
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