Counting to 100 flashcards

Who would have known that a boy would be so excited about flashcards?!  Since he's going into kindergarten in the fall (sniff, tear!), we've been working on some kindergarten prep workbooks over the summer to keep up with what he learned in preschool this last year.  While the workbooks have been great, I felt like we needed something that was smaller and that we could just pull out at any time.
I decided last night to make up some flashcards real quick, counting 1 to 100.  There was nothing difficult about this project at all...a stack of 3x5 cards, a keyring, a hole punch, and some markers!  In addition to just writing the numbers on each card, I also spelled them out.  Figured we'd keep up on the letter recognition as well as number recognition!
For about half an hour last night, all he wanted to do was go through the flashcards!  We counted to 100, spelled out a few numbers, and then had him identify random numbers.  When he was done and it was time for bed, he asked if he could take them to his room and put them by his bed so that they "could watch him sleep".  (There's a backstory to the objects to watch him sleep that I'll tell another day!)  While in the car this morning on the way to swim camp, he begged to take the flashcards along and was shouting out numbers to me the whole ride!  At some point, I'll let him practice writing his numbers on the cards too.  Here's to keeping up with education over the summer!