Monday, February 16, 2009

Gluep & Ooblek

Ivy is enjoying some free science time, meaning she's free from curriculum and can explore whatever she's interested in. She came to me this morning with recipes for gluep & ooblek. It was a smashing success and we had a lot of fun doing it.

Dissolve 1 tsp borax in 6 tbsp water. In separate bowl mix 1 tbsp white glue with 1 tbsp water. If you want it coloured, add one or two drops of food colouring to the glue mixture. Add 2 scant tsp of the borax solution to the glue. Mix until it turns into gelatinous goo and then play with it.

This was was a little trickier as the instructions were vague. Fill a small bowl half full of cornstarch and add water. There's a magic sweet spot where it's in limbo between solid and liquid. If you try to stir quickly it chunks up like a solid, but when you put it back down it oozes together. Ivy's assessment was that it was like it was "...on a timer for solids. It's solid for a few seconds and when time runs out it turns into a liquid".

From the book: Science Smart: Cool projects for exploring the marvels of the planet earth, Gwen Diehn, Terry Krautwurst, Alan Anderson, Joe Rhatigan, & Heather Smith

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