The latest GWP (gift with purchase) promotion to hit LEGO Stores and LEGO.com is the LEGO Super Mario Fuzzy & Mushroom Platform Expansion Set (30389) polybag!
You can bag it for free with purchases of LEGO Super Mario sets and a minimum spend of £40/€40/$40 or more.
Strangely it excludes both the Starter Courses (Adventures with Mario Starter Course (71360) and Adventures with Luigi Starter Course (71387)).
The free polybag GWP is available now until 5th September so plenty of time to budget and plan your next LEGO Super Mario purchase, as I think they’ll have a lot left!
You can alternatively seek it out on the secondary market, places such as eBay, Bricklink, Zavvi, The Hut etc. I managed to pick up two on pre-order from Zavvi a month or two ago.