There are several songs that children can sing that will teach them basic anatomy and are physically interactive as well. "Head, Shoulders, Knees and Toes" and "Dry Bones" are two examples. Singing "Head, Shoulders, Knees and Toes" teaches kids to identify basic body parts plus eyes, ears, mouth and nose. "Dry Bones" will teach them body parts from their toes to their heads. Note that this song will not teach them the names of the specific bones, but rather the body parts that use those bones.
You can introduce children to something they're already familiar with but in a different way. Have them help fill the ice cube tray and talk about how what you put in is water. Ask them what they think will happen if you keep the water in the freezer for a few hours, then place the tray in the freezer. After a few hours take it out and explain that it's still water, but now it's frozen into a solid. Leave the tray out and check on it every 15 minutes to watch it gradually melt and explain that the ice is changing back to a liquid.
Use a scale and different objects to teach the children about weight. You can use a digital scale or a balancing scale and small random objects, such as toys and crayons. With digital scales you can line up the objects from lightest to heaviest and ask the children after each object is weighed if they think the next number will be bigger or smaller. Use words such as "heavier," "lighter" and "equal weight" to help them begin to understand what such terms mean. With a balancing scale you can do the same thing but with two objects at once; be sure to ask after each weigh-in which is heavier and which is lighter.
Gather various objects in your home or classroom that are made of different materials and which feel different to the touch. Tell the children what the material is and ask how they think it would feel. Remind them of some adjectives that they are familiar with, such as "soft," "smooth," "cold" or "rough.} This will get them thinking about how everything in the world around them has it's own unique texture. You also can have children do this activity with a book that offers different textures within it.