balloon decorations without helium. Smart since there is a global helium shortage cheap easy party decor. put a small marble in the balloon before hanging it upside down and they won't move around so much when air hits them or people walk by
DIY Portable LEGO Kit with Free Printable Activity Cards. I like this for school, older kids can have activity cards to create planets/atoms/molecules/fractions, younger ones can practice fine motor skills.