If you are looking for something smaller than the 1/24 scale, Nikko also has a line of mini radio control cars.
Nikko doesnt limit themselves only to building one style of boat either. They sport a sailboat model as well as a submarine. They have the Wave Skier, which actually has a skier that trails behind the boat. They also have the Sea Tiger submarine designed for the youngest radio control fans. Nikko radio control trucks come in varieties such as the Jeep, Avalanche, Ram, and Hummer. Nikko even makes a special Hummer that has a camera attached to it. They call this their Hummer H2 Spycam, and it comes in 1/14 scale. It even has headlights to light up the area for the camera.
Nikko also sports their 1/18 scale Executor, which has dual motors and rubber tracks like the ones on bulldozers. This makes these great Nikko radio control cars for use in rough terrain.
The cars come in 27MHz or 49MHz so one of your Nikko RC cars can be raced against another car from Nikko or other manufacturers as long has the two cars have different frequencies.
If you are buying multiple Nikko radio control cars or know who you will be racing with, check the frequency of the cars to make sure they are different. This is important because you cant change the frequency of most Nikko radio control cars.
Some of the larger Nikko radio control cars do come with removable frequency band crystals, which can be changed in the vehicle. Changing the crystals out allows a vehicle to operate on a different band of the same frequency. There are six such channels possible, so you could race up to six vehicles at the same time.
If you are in the market for radio control cars, the vehicles mentioned here are just a few of the Nikko radio control cars they have to offer. As mentioned before, they claim to be the largest manufacturer of radio control vehicles, and they seem to be coming out with more models everyday.