Here are some ideas for excursions outside of Vienna:
Eis Greissler – their adventure park offers a variety of fun attractions and features a water playground, pedal go-karts and a giant slide.
Corona am Wechsel – in summer or in winter, the Erlebenis area offers activities for the whole family.
Family Park – offers numerous attractions for all ages in a park area of more than 145.000 m².
Zotter – the Zotter Experience World offers a cocoa cinema, tasting tours and an organic adventure farm called Edible Zoo
Swarovski Kristallwelt – The play tower is a must for the kids, and their outdoor play area, marble run and park are amazing.
TIP: For more inspiration, look at what the NÖ card has to offer.