Q. The background of our family is Chasisdic and there was a minhag in the 'Alter Heim' (the old country) that the Chassidim would during Sehvii Shel Pesach pour some water on the floor and then Rebbe would dance back and forth on the water puddle, while the Chassidim sang the Shira.
When we told our children about this beautiful minhag, they decided that they want to do the same. Since our home with pools is in Miami, we were wondering if it is possible for them to do so on a very shallow children's pool during Shabbos or Yom Tov. while the parents sing the Shira, being careful with all different prohibitions such as washing or wetting the grass, and being properly dressed etc.
Is it Permitted? is it recommended?
A. Darkei Chaim Vesholom (618) quotes that tradition by the Munkatcher Rebbe. Halachos and Minhagim (46: 15) mentions that some Rebbes would indeed follow a similar tradition during the 'Tish' (or meal celebration) of the night of Shevii Shel Pesach.
See question 2262 regarding submerging in a lake on Shabbos for tevila in a mikva purposes.
Horav Aharon Miller's Shlit'a opinion is that there are various other issues involved that need further clarification.
Rabbi A. Bartfeld as advised by Horav Aharon Miller Shlit'a