Could you tell me how much the entrance costs in general and what days are when they have an event, and what can you take, I mean food or drinks

The entrance fee is $4 per adult. They dont check bags. we had picnic there, sandwich, chips, etc..there is a train ride you can take on Thursday, friday and Sunday, other than that not sure of other events..we saw few older kids digging after someone talked about rice farming, not sure if it was an event thing or impromptu

English please