We have Leapsters, and just returned from our trip. The kids brought them for the plane/airport/downtime in the room, but we didn't bring them into the parks. They are a bit heavy, and honestly we didn't need them at all! They did SO well waiting in the lines, but I did bring boxes of raisins/granola bars just in case they needed to be kept busy for a few minutes. My son actually brought 1 matchbox car that I slipped into my bag and would take out if he got fidgety. Worked like a charm!