The police have said that the explosion, which took place at around 3.30 pm at Laxmi Tara Complex in Dange Chowk of Pimpri Chinchwad wasn't a terror attack.
A bomb disposal squad though has reached the location.
According to media reports, bag containing chemicals exploded when the child tried to open it.
The police are still not clear about the nature of the eplosion or how the blast occured.
A few weeks ago four bombs had exploded in the city on a busy street during the evening rush hour leaving Puneites on edge.