Directed numbers practise

This sprout was a bit painful to build. Thirty-two pages and over two hundred buttons! I don't know if I will make many more like it however I could use it as a template for additional negative number practise sprouts which would be pretty easy. Keep an eye out for more of those. 

It is my first time incorporating sound in a sprout and I know it can be annoying but there is always the option to turn off the speakers. Incidentally Sproutbuilder only accepts MP3 sound files and one of the best places to find sound effects was at Soundsnap, a community of sound effect sharers.