I'm not a huge fan of plastic anything, but here is an exception.
We're lovin' the Deluxe Marble Run.
This was the only store-bought present for Dash for his birthday last month. Money well spent. The kids (okay, and ME, too) have spent hours playing with this thing. We're not the only obsessed ones; every child that comes over, gets glued to this. It's mesmerizing: create, build, set off marbles, loop, twirl, spin, circle, shoot down. Fun! You can see our other, wooden marble run behind this one. I love it, as well, (especially because it was a $2 yard sale bargain find.) However, there is something special about actually creating your own "system" to set into motion.... so the new plastic one gets a higher rating from me. Can I get away with calling this pre-K physics??