Take a look at these pages to learn more about both 3D solids and 2 D shapes.
This page focuses solely on 3 D shapes. All you need to do is click on the solid and it will tell you about its properties as well you can have it rotate. Another key thing is that you can print out each solid’s net so you can make them at home!
This page is a little collection of online activities you can play that focus on 2D shapes as well as 3 D solids.