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Mandy would like this: popsicle stick bracelets: boil in water for 15 minutes then place in cup to dry~this is cool!
Handmade Boats - cute kid's project, or make cute decor for a beach house (or a beachy feel)! Directions for origami boats to match your sailboats/rafts, too! Could jazz this up even more with candles, esp. if it's light enough for these babies to float in a whole ocean scene!
Craft sticks, wooden circles, hot glue, ribbon, and paint.Spray it with Glue and sprinkle fake snow and clear glitter on it. Can do! This would look great on the front door of some one who has a snow flake themed Christmas decor!!!
Build the catapult in different sizes, or with different rubber bands, or pencils of different length - discuss the changes each variable makes to the resultant motion of the projectile. Demonstrate circular motion and rotational KE. Based on the relevant principles, have the kids design and build other working models of catapults. Here are some ideas.