1-bit binary counter is like dividing the iput signal by 2; 2-bit binary counter will add just another, identical stage and will divide the input signal by 2:2 =4 ..
You can buils a 2-bit binary counter using flip-flops, for example J-K or D ..
Here you will find an example of a 2-bit binary counter build around the D-type flip-flop (CD4013) .. **broken link removed**
In the next stage, the outputs from the 2-bit binary counter can be connected to the A and B inputs of a 2-to-4 decoder, for example 74HC139: http://www.fairchildsemi.com/pf/74/74VHC139.html ..