Three children's toys, all sold in the lead-up to Christmas, have been recalled by Health Canada due to potentially dangerous substances.

The most popular toy recalled is the Slimosaurus BlowUp Goop with a Dinosaur Fossil, a balloon-blowing kit sold by Dollarama. Approximately 310,000 units of the product were sold between April 2007 to November 2009.

Health Canada testing determined the toys, which were manufactured in China, contain organic solvents that have been banned in Canada since 1973.

Officials say children using the toys to blow balloons may inhale vapours that could, over extended periods of time, lead to symptoms of central nervous system depression or dysfunction.

Prolongued exposure can lead to more serious symptoms, including muscle twitching, unconsciousness and coma.

The product comes in eight different styles and colours, and can be identified by item #08-0804322. Parents are advised to take the toys away from their children immediately and throw them in the trash.

For more information, consumers can contact Dollarama Customer Service at 1-888-755-1006 (ext. 1000).

The Star Trek U.S.S. Enterprise Bridge Play Set by RP Toys is the second most popular recalled toy, having sold 950 units across Canada since April.

Health Canada testers determined that the flexible screen at the front of the bridge contains more than the allowable amount of potentially toxic chemical barium.

Barium can cause nausea, vomiting, diarrhea and cramps.

The recalled bridge toys can be identified by item #61901 and UPC 0-43377-61901-7. Parents are instructed to remove the flexible screen from the bridge and dispose of it. Replacement screens can be obtained by contacting RP Toys at 1-877-877-211.

Finally, the Flashing Eyeball Glideball, sold exclusively at Pier 1 stores, has been recalled.

Roughly 770 of the floating eyeball toys were bought between September and December 2009, and officials say the product contains low viscosity petroleum distillates, which are highly toxic if ingested.

Parents are advised to throw the toy in the garbage and contact Toy Investments Inc. at 1-800-356-0474 with further questions.

Health Canada has not received any reports of illnesses or injures related to the use of any of the recalled toys, but are alerting parents as a safety precaution.

For more information on recalled products, visit the Health Canada website.