Here's a fun way to use those noodles- a pool noodle water wall! Tons of fun, takes seconds to put together, can be set up in the bath or outside, and afterwards you still have in tact noodles to use for their intended purpose- THE POOL!
Paint that grows. Mix 1 cup flour, 3 tsp baking powder, 1 tsp salt, and enough water to make consistency of pancake batter. Divide into 4 parts and put in snack size Ziploc baggies along with food coloring. Squish it around to mix up the colors. Rubber band like icing bag and snip tiny hole. Squeeze to paint and then pop paper in microwave for 30-45 seconds and watch the paint puff up and grow.