or Dad for that matter.  But,,

It's her birthday, she sees something that for the moment means the world to her and she will remember forever you got her exactly what she wanted for her birthday.

It's $20 bucks, and yes you know it's a POS, but its her fourth birthday she should be happy on her birthday.

Save the "life lessons" for one of the other 364 days of the year. Remember we're talking 4 not 12,, pretty advanced concepts you're expecting a 4 year old to remember..