Here are four shorter ways to say that, written for a 7-year-old:
- Bugs make the echidna's nose tingle.
- The echidna's nose feels tiny zaps.
- Moving bugs give its nose little shocks.
- The nose gets tiny zap feelings from bugs.
How I shortened them: I used simple words (zap, tingle, little shocks) and fewer words so they are easy to understand.