*I just flew on an airplane for 5 1/2  hours with my 3 and 4 yr. old (by myself)!  I won't go into detail about the whole tiring trip, but this is one thing that kept them busy for quite some time!  The four year old really got into them.  I loved the imaginative aspect of so many of the cards, and he really fed on them! Both of them really liked the idea that they could draw on them and wipe it right off with your finger!  I highly recommend for summer travels!  The box is big enough for two Expo markers!  I am thinking of getting a pencil box to keep them in for easier access for them on their own!  All I had to do was give them the one liner direction on the cards and away they went!  Thanks for such a great educational, fun thing to keep the little ones busy!!!  --Holly Maxwell