Be Amazing! Toys, of Salt Lake City, Utah, is recalling about 15,400 Monster Science and Super Star Science! Colossal Water Balls in the U.S. and Canada.

The soft and colorful product can be easily mistaken by a child for candy. If the marble-sized toy is ingested, it can expand inside a child’s body and cause intestinal obstructions, resulting in severe discomfort, vomiting, dehydration and could be life threatening. The toys do not show up on an x-ray and require surgery to be removed from the body.

No incidents or injuries have been reported, but U.S officials are aware of one incident with a similar water-absorbing polymer ball product in which an 8-month-old girl ingested the ball and it had to be surgically removed.

This recall involves marble-sized toys that absorb water and grow up to 400 times their original size. They were sold as Monster Science Colossal Water Balls (model #7255) and Super Star Science! Colossal Water Balls (model #7704). Monster Science packages contain eight balls and “Growth Powder.” Super Star Science! packages contain five balls. The balls were sold in an assortment of blue, green, orange, purple, red, yellow or clear colors.

The “Be Amazing! Toys” star logo, “Ages 8+”, the name of the toy, “Colossal Water Balls” and a warning not to use without adult supervision are on the front of each product’s packaging. Model numbers are printed on the back of the packaging.

The balls, manufactured in China, were sold at specialty retailers and education centers nationwide and online from September 2010, through November 2012, for about per package.

Consumers should immediately take this recalled toy away from children and contact Be Amazing! Toys for a refund.

Consumers may contact Be Amazing! Toys toll-free at (877) 798-9795, from 9 a.m. to 5 p.m. ET Monday through Friday.