I like everything about the tubes :)) but a little pricey :((

My class absolutely loves these!

These really are great manipulatives! The current tube is marvelous - perfect color for demonstrating this concept! The favorite is Viscosity/Gravity - perfectly done!

I thought these were expensive to begin with, but when I saw the size I was extremely disappointed. These are tiny compared to earlier versions and in my opinion not worth the price tag. They do function as shown, but check the size because this version is way smaller than the original. I could use the originals in front of a classroom; these are truly just for individual use.

Kids loved them

My kids love

These are beautiful, well made, and interesting for any age. Thanks so much for having these available!! A great gift for the grandchildren--and I want a set, too!!!

This tubes are great! We received these as 4th birthday presents for our twins (boy and girl) and they were an instant hit. The colors are bright and distinct for each property and the tubes are made of high quality materials. I would buy again.

My students love these discovery tubes. They have been dropped on the floor and have not broke. They are the perfect size for little hands to handle.

I have had these in my science center for three years. Children love looking at them. I have had kids drop them, roll them, kick them, step on them etc. and they are still intact! The clear plastic is starting to get dull from getting a lot of use from ruff and tumble kids.

My 3 year old nephew is MESMERIZED by these colorful tubes. I love that they are sturdy and leak-proof.

My kids like to flip these over & over again. They also like to try to make their own like these.