focused on fish

We often find ourselves surprised by how focused or interested Thomas can be in something. Give him a great new car or block or book and he'll spend 15 or 20 minutes playing with that one toy alone. We don't really have experience to compare it to, but it seems like a long period of time. Today we took a trip to OMSI with his cousin (F is pictured in the previous post). M plopped Thomas down in front of the fish tank and Thomas was absolutely mezmerized. The fish were totally fascinating him...
[Note to self: Replace the three dead guppies with a new goldfish.] Those darn guppies are just not hearty fish at all!