Using authentically-captured engine noise from real cars, Tomica has managed to cram micro-electronics in the Basic-line Tomica, so that when you touch it, it makes all sorts of sounds, from idle to revving to horn sounds, while emergency vehicles have sirens.
See it demonstrated here (also it showcases some upcoming Tomica Basic, including mi amore LaFerrari, among other goodies...) at this year’s Tokyo Toy Show:
News originally found on 829Japan.
http://829japan.com/2018/06/08/news-tomica-at-the-tokyo-toy-show-2018/