Spark: Monster Putty Use the special putty and plastic parts, to form cool monsters and funny aliens, simply attach the accessories to create your monster! The intelligent putty changes within a few minutes due to its special characteristics. Age 8+
PRODUCT DESCRIPTION Make plump and squishy polymer gel beads to demonstrate the molecular structure of plastics. Form the gelatinous globules by dripping sodium alginate into a solution containing calcium ions. Learn how massive chains of polymers make these fun squishy...