The local ski resorts in Ehrwald offer fun on the slopes:

Ehrwalder Alm (family ski area)
Sonnenhang lifts and Wettersteinbahnen (accessible from the town center)
the Zugspitzplatt on the Zugspitze Glacier (cross-border ski area)
You can book ski lessons at the two local ski schools, and professional sports stores and ski rental shops will provide you with ski equipment.

With the multi-day ticket, you can access not only the ski areas in Ehrwald but also the Arena ski areas in Lermoos, Biberwier, and Bichlbach/Berwang—and, with the Top Snow Card, those in Garmisch-Partenkirchen and Mittenwald as well.

For snowboarders, there are dedicated snowboard and freeride parks, such as:

Better Park at the Ehrwalder Alm
Funslope 'n' Trail at the Gamskarlift near the Wettersteinbahnen
Obstacle Park at the Thanellerkarlift in Berwang