'Not suitable for children under 3 years old'

My colleague Clutchslip has forwarded on this extract from the latest edition of Transport News Brief, the Society of Motor Manufacturers and Traders' email newsletter:

Transport News Brief reader Owen Ryder of Cummins recently bought a birthday card for his baby daughter. On the front it read "Happy Birthday To A Special Girl On Your First Birthday". On the back it said, in small print "Not suitable for children under 3 years old". He's now not sure for whom this card is suitable.