Went to local park yesterday and walked into the sandpit area with my daughter (just turned 2) and a boy (turned out he was 3) came straight up to her and said 'I want it!' and took the bucket and spade off her and started playing. My daughter just stood there and tried to get it back but he continued to dig. I said loudly 'X, just let him have a go with your bucket and spade' thinking a parent would realise and come over. His dad approached, said hello to me and proceeded to watch as his son continued to play and my daughter watched. I then said 'Right, it's X's go now' and when he didn't hand it over I gently took it from him. Dad just watched. Was I unreasonable?