A firecracker simulating device includes a plate, an actuating device attached to the plate and extended outwardly from the plate, a number of balloons are strung together, and a forcing device may be used for forcing the balloons to engage with the actuating device, to have the balloons to be pierced by the actuating device, and to generate sounds of explosion. The balloons may be strung together with a wire. The wire may be engaged through an opening of the plate and pulled by the users. A bar may be attached to the plate, for attaching the plate to supporting members, and includes a ring, the wire may be engaged through the ring. A weight member or a flag may be attached to the wire.