One day after we had arrived home, I was unloading Colin from the car when he started very insistently saying "T, ta ta ta, T ta ta ta." I was extremely confused until I stopped and listened to the radio. Delilah by the Plain White T's was playing.
Colin and Grandma had been enjoying this quite clever Sesame Street Video: "I'm the Letter T"
Ever since, any time he hears that song, he tells me what sound T makes. It's absolutely adorable, so the Plan White T's are getting some pretty serious play time around here!