Trumpet and Cornet
Trumpet and Cornet are very similar to each other. Technique is virtually the same. Trumpet has a strong, bright tone, while the cornet is a little more mellow. The Cornet's tubing is more tightly wound, making it a little more manageable for younger players to hold. Cornet is a traditional brass band instrument, while Trumpet usually isn't. (But the player can easily play one or the other as required). For very young players, a smaller, lighter instrument called a "pocket trumpet" may be used.
French Horn
The French Horn (usually known just as the Horn), is reknowned for its mysterious and noble character. It features a lot in movie music and blends equally well with strings, woodwinds and other brass. Younger players can start on a smaller "child size" horn, which winds the tubing tighter, so it's more comfortable for young hands, and also simplifies the fingerings. French Horn is not a usual brass band instrument and is more commonly found in orchestras and wind bands.
Tenor Horn
The Tenor Horn (sometimes, confusingly also known as the Alto Horn), is a standard member of the brass band family, and rarely seen outside these circles. It has a beautiful, light and warm sound. Although it is played by many talented adults, it is an excellent instrument for the young beginner due to its comfortable size, light weight and ease of note production.
Trombone
At home in a huge variety of settings, the Trombone is unique amongst the brass instruments as its primary method of obtaining different notes is through lengthening its slide. Potential beginners often wonder how to find the right place, but it's actually very straightforward. The Trombone is a low sounding instrument which is a lot of fun! Young players can start on plastic/carbon fibre instruments which allow them to start a little younger than traditionally, while ensuring great posture!
Baritone Horn and Euphonium
Both the Baritone Horn and the Euphonium are low pitched members of the brass family. They are primarily found in brass bands and concert bands, where they both play very important roles. Similarly to Trumpet and Cornet, they are exactly the same pitch, yet they sound quite different. The Baritone usually uses three valves, is quite bright and can be very powerful. The Euphonium has a sonorous warmth which can soar over the band and often has a fourth valve to help it play extra low.
Tuba
The Tuba (sometimes called a Bass) is the lowest of all brass instruments. Although not as light to carry as a Trumpet, the Tuba can play beautiful and playful melodies with great sonority. It is a myth that players need "massive" lungs to play the Tuba, though learning to control your air is a focus. Tuba players usually have the most fun in the band!