I know the lyrics to songs sung by my children's toys
What was your reason for learning the lyrics to the songs of your kid's toys?
Because I always play with the toys with my children.
I think that's nice, because it's good when a parent gives their kids toys and plays with them. Continuing to do so will definitely help your kids to feel loved.
I hope they appreciate it!
I think it is cute that you can sing along with the toys. This probably makes you really fun to play with for your children, and they probably get a kick out of you being able to harmonize with their toys.