Could add these plugin?
SimpleTrails (http://dev.bukkit.org/bukkit-plugins/simple-trails/) - effects for players
Fred's awesome Jetpack Plugin! ( http://dev.bukkit.org/bukkit-p…s-awesome-jetpack-plugin/ ) - Jatpack for players
Fun Horses ( http://dev.bukkit.org/bukkit-plugins/fun-horses/ ) - Horses for portable players
