I took economics in High School, and I know that (in my lifetime) a loaf of bread could once be had for 50 cents, a gallon of gas was less than 70 cents, and that $5 was once considered an exorbitant price for a movie ticket.
That said, I can’t ever really wrap my head around inflation. I attribute this to Hot Wheels and Matchbox cars. When I was 5 or 6, and started learning about money and earning allowance, a Hot Wheels cost $1.00. More than 40 years later, a Hot Wheels costs $1.00.
EDIT: As of yesterday afternoon (2/19), a Hot Wheels costs 89 cents (at Target anyway).