Feeling Sorry to read the stolen bike of cute handsome boy. Stolen bike hurt you in two way. one it was your asset and some one stole your hard earned money assent and second one is the big one seeing the grief in the eyes of handsome kid. It's a really tough for mum to see tears in the eye of her child. My all sympathies with you
You can console him by giving him a big hug and tell him the reality of life. No things is mortal.we lost our love one permanently, they never come again. Things come again. so no problem if the bicycle has gone i will give you better bicycle on your upcoming birthday. My son beaware of this world. This World will ditch you so don't blame other. You should save your thing yourself, give him awareness of responsibility in a gentle. Love of mom is so pure that it will do any wonder. Hope it will help you. All the best.