Acorn trees

We are growing "acorn" trees.  I love this.... Early this spring, on one of our first days playing in the backyard once the snow melted Nora saw acorns all over the yard and wanted to collect them.  I got a bowl for her to pick acorns...ok, no biggie.  I gave her one of the gerber disposable travel bowls, when she came in she set the bowl on the counter, no biggie.  The bowl sat and the next week for school we were running late, as usual, and it was a "show and tell" day.  I told her to take the acorns for show and tell, which she agreed, so I put a cover on them, no biggie.  They came home and found their way back to the counter, with the cover on this time, and were forgotten about.  About two weeks later, we notice there was moisture in the bowl and two (yes, two, not one or three, but two!) acorns were starting to sprout.  We put each one in a gerber bowl and put them in the window.  They took off, so when the weather warmed up we put them in pots and they are still growing like crazy.  So each girl has an Acorn (oak) tree from the first year we moved to the UP.  The plan is to keep them in the pots until we have our own property and then we will plant them.