Magnimals were and are subject to a product recall by Mega Brands coproration.
Please see this page for more information:
Product information - Megabrands.com - this gives information for making a replacement claim in the USA - if you have experienced the UK process please post ...
I saw a set of these in Woolworths yesterday and fell in love with them 
Magnimals from Mega Blocks .. it looks like they are quite new so wanted to ask if anyone has any and what they think of them..
Magnetix Magnimal ~ Lamb and a Dinosaur theres also a bee, dalmation, monkey & rabbit !