I recently saw people using aqua beads for a fun sensory experience with their little ones so we just had to try them! I found some for a great price here http://www.etsy.com/shop/StephiiShop I just asked them to send mixed bag so we could have lots of colors! We have only used half what we were sent and we are still having lots of fun with them!
If you don't know what aqua beads are they come as little hard beads and you add water to them and they grow and grow and grow! You can see the before size and after above (we added more water and found that they actually get bigger than the one above)
They are non toxic (though I still don't let Colten eat them) they are squishy after they grow and can be broken. You can add them to your plants and they will continue to fill with water and then slowly release it and dry out until more water is added.
We have had lots of fun with them transferring them from pans to cups.
Scooping them and using funnels
Here is what we got with half of what we got (after adding more water this container was full! And I have about 1 tablespoon or less of little beads to start with)
Both my 3 1/2 year old and 1 yr old loved these (again watch for eating but after a few times of telling him not to it wasn't a big deal)
This was not sponsored by anyone, we just had so much fun we had to share!