If you are stuck for a few minutes at a traffic signal in the Bangladesh capital Dhaka, you will probably see children rushing up to the windows of your vehicle. 
Pale inapotokea umekwama kwa dakika chake katika taa za barabarani katika mji mkuu wa Bangladeshi Dhaka, bila shaka utaona watoto wakijazana kwenye madirisha ya gari lako.