Dinky toys, especially heavy metal tanks with chain treads that moved, and the howitzer or antiaircraft gun that you could put a cap in for a bang as the spring shot a ladyfinger firecracker out the barrel.
Those 10-cent balsa gliders.
And the 10-cent rubber or plastic soldiers about two inches high.
Whiffleballs with skinny wooden or fat plastic bats.
And lately the great Matchbox Collectible 1/72 diecast metal WWII and Korean war airplanes.