Human rights organizations have warned that the frequent presence of children at Egyptian protests -- on both sides -- poses significant dangers to their safety. Opponents of Morsi and the Muslim Brotherhood have accused the Rabaa protesters of using children as human shields or to promote sympathy for their cause.
Large numbers of Brotherhood and Morsi supporters have been killed in clashes with security forces since Morsi's ouster, in some cases dozens at a time.
A coordinator for the event, which Pro-Morsi protesters are calling "Children against Coup," told a reporter with the Turkish outlet Anadolu Agency, "The amusement park is one of the top destinations that children visit during the Eid with their fathers, and since the fathers would be here in the square, we thought of setting up 'Rabaa Park' here."
Here are more photos from today's celebrations: