I've thought about doing them as an adult, but our friends don't live in a concentrated enough area, even though it's better than it was in the Bay Area. If I'm going to drive even 15-20 minutes to people's houses, much less 30-40, I don't want to ring the doorbell and run away! I want to see them and spend time with them! Also I'm not sure how many people would get it. If you found a little decorated basket with fruit and nuts and candy on your doorstep on May 1, would you know what it was? Did you do May baskets as a kid?
I also would have loved to pick fruit for Arbor Day, like we always did, and maybe plant a few things, but most flowers and veggies really shouldn't be planted in April in Minnesota, and we're not in the market for a tree at our own house -- in fact, I believe I casually pulled up two or three poplar seedlings on Arbor Day, now that I think of it. They keep popling. I'm going to have to take the weed bucket out as soon as it's nice and pull up dozens of would-be trees. Our yard is convinced that it's supposed to be a forest. I like that it does that, but I can't let them grow nestled up to the house. Ah well.