When you visit the Bird Kingdom in Niagara Falls, you will be able to also visit the section on reptiles. They have ‘real’ Geckos and lizards and snakes – definitely snakes. The smile of the young lad in the photo with the boa constricter is not one of enjoyment but a crazed look of fear.
Check it out: Bird Kingdom – Reptiles

Boa Consticter around boy's shoulders