How long does a new toy last? It’s disproportionate.
Three weeks of your kid whining and cajoling and promising “I’ll be soooooo good.” Three days of you shopping around for the right fireman-firetruck-firehouse set at the right price.
After all that, you deserve at least three months of mileage out of the newest toy. But after a few hours (or a full day if you’re lucky), it trickles out.