Last year the girls talked us into buying a lifetime subscription for an online game site they liked. The site was appropriate for children through age 12, so we thought it was a good deal since we'd get a few more years for the cost.
This year we cannot get the girls to go to that site. The blond twin said, "It's boring now."
We should have known better. The problem was two-fold. First, one part of the site had learning games through age 12. The girls are reading and doing math at or above that age level. They are bored with the games even though their ages mean they should still be challenged. Second -- and perhaps more importantly -- they are nine years old. Their tastes change quickly. For them a lifetime membership doesn't meant the same thing as is does to us.
We learned our lesson. We'll buy the ocassional monthly membership, but nothing more. I'd like to think we won't make the same mistake twice.