O.K. my 7 and 10 year old sons are constantly borrowing my pedals and I want to get them each a starter set of basic pedals and power supply and we can build a board together for a project. So I am looking for the cheapest pedals that meet the following criteria and complete the need list. Also what is a cheap way to power them and get away from batteries. Pedals must be cheapest in category, available to purchase new, powered by 9v adapter. Tuner Wah Dirt/Distortion Phaser Tremolo Delay Power Supply Thanks in advance. This is going to be fun to put together!