Barrie police say the thefts happened Saturday when a man and a woman entered the store in the city's south end, both of them communicating on cellphones as they looked around.
It's alleged the man took several items out of their packages and that the woman then stuffed the items into the side of the fake pregnancy belly she was wearing.
Police say the pair, who were captured on security video, left the store and were seen leaving in a silver Dodge Caravan before store security could stop them.
Officers who arrived to investigate decided to contact other electronics stores in the region to advise them of the incident and give them a description of the two suspects.
Police say security at a store in Newmarket reported that the suspects had just left and that employees were able to identify a licence plate as their vehicle left the parking lot.
An image of the suspects taken from a store security camera has been posted on the Barrie police website.
The investigation is continuing but police say the suspects are believed to be from the Toronto area.