They always offer free shipping, returns, and exchanges in case a piece doesn't work out. (bylaurenm.com)
Instead, it is most useful to understand copyright law and contract law, and perhaps patent law just in case some piece of software is patented (see this for an overview in the US, and this for the UK). (law.stackexchange.com)
Gnawing on it will feel good and taste good, but you'll have to keep an eye out just in case pieces break off, as they could be choking hazards. (pregnancymagazine.com)