This is a great recipe to make with children. Except for cutting the lemons in half, no dangerous equipment is used and the result is instant (especially if you use chilled water). If reaming is too hard for the kids you can use a regular juicer or handheld squeezer (and add an extra step of pouring the liquid through a strainer). My son wanted to use a "slice" squeezer and I cut slices of the rangpur lime for him to squeeze in it.