- The minimum allowed quantity for Hydrophobic Sand is 12 (you currently have 0 in your cart).
$2.00 incl GST & delivery
A fun and exciting introduction to acids & bases, indicators, chemical & reversible changes. Squirt on a white cloth and breathe to acidify the solution and make it go clear. See if you can reverse the blue colour with an alkaline soap (see below).
Age: 5 to 12 years
Included: 30mL ink & 1 instruction sheet
Minimum order: 12 (packs of 12) FREE shipping