Building a terrarium out of plexiglass and silicon sealant is a fun project for multi age groups. The older kids can do interesting math projects like "calcula

Building a terrarium out of plexiglass and silicon sealant is a fun project for multi age groups. The older kids can do interesting math projects like "calculate the volume of the aquarium" or "calculate the total cost of parts cut at the hardware store". Then both groups can go out into a park or wilderness area and collect insects, moss, plants, soil, rocks and amphibians to put in the terrarium after it's built. You can collect these in mason jars or recycled bottles with holes poked in the lids (when necessary). If you have a microscope or handheld lens you can look at pond water or found objects to observe what is hidden to the naked eye. Teaching kids how to do field reports and write their observations, make drawing, etc. The older kids can give lessons and teach the younger ones.