With spring here we’ve been out in the yard A Lot, including landscaping and planting new gardens in both the front and back yards. In order to get the girls more involved when we are doing the yard work, we put them on weed duty. We filled spray bottles with plain, cheap white vinegar and had the girls spray the yard. It’s very eco-friendly and you don’t have to worry about little ones getting it on their hands or in their mouths (which tends to happen with little ones, at least with my kiddos).
If you don’t want them killing your other plants or smelling like a dyed Easter egg, then just put water in the bottles and let them water the plants.