Stop. Rewind. ---- I forgot to mention Hunts! 0.o
Hunts in SL are similar to scavenger hunts, only you get stuff you actually want to keep. You search stores for the designated "hunt item," which holds some item from the store that you would normally have to pay for. Some hunts do cost L$, it just depends on how expensive the hunt items are. Think: Lucky Chairs and MM Boards mixed with a Scavenger Hunt. Normally, stores will have ads for each hunt posted in the front by the entrance with a sample hunt item.
Here are some links to April/Easter themed Hunts:
Where the Peep Are You? Hunt (Hints Blog: Link)