Bundle includes a handheld WEATHERMETER and Weather Science Kit Activity Cards. The WEATHERmeter is a highly accurate handheld device used with your smartphone to measure wind, temperature, humidity, and pressure. The device connects wirelessly up to 100 feet away.  Learn more HERE.Crafted in collaboration with Disney's Weather Check, your children can use data from the Tempest and the WEATHERmeter to play weather bingo, see how buildings can affect wind speed, track changes in temperature in shade vs sun, and more! 20 cards total, featuring 12 activities.  Cards measure 5.5 x 8.5. Recommended for ages 8+. Additional experiments and resources crafted by WeatherFlow-Tempest meteorologists can be found HERE. Activity cards are part of the Tempest Weather Safety & Science Kit. The cards and WEATHERmeter bundle are add-ons for those who already have a Tempest Weather System and would like the cards as well.