Balloon Rockets - I've done this in several science camps I've conducted. Kids have fun with it. But, when the balloon deflates it may fall off the straw because it's surface area changes - another good thing to show and explain to kids.
Under Construction Sensory Box Create a construction site right in the living room! Grab a storage bin, fill with rocks and look around for any hard hat type machinery from the bottom of the toy box, under the bed, our outside. Sit back and watch your chi