diff --git a/crates/comet_fonts/Cargo.toml b/crates/comet_fonts/Cargo.toml
new file mode 100644
index 0000000..c8e8648
--- /dev/null
+++ b/crates/comet_fonts/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "comet_fonts"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/crates/comet_fonts/src/lib.rs b/crates/comet_fonts/src/lib.rs
new file mode 100644
index 0000000..b93cf3f
--- /dev/null
+++ b/crates/comet_fonts/src/lib.rs
@@ -0,0 +1,14 @@
+pub fn add(left: u64, right: u64) -> u64 {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}
diff --git a/crates/comet_sound/Cargo.toml b/crates/comet_sound/Cargo.toml
new file mode 100644
index 0000000..a2d1566
--- /dev/null
+++ b/crates/comet_sound/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "comet_sound"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+rodio = "0.12.0"
\ No newline at end of file
diff --git a/crates/comet_sound/src/main.rs b/crates/comet_sound/src/main.rs
new file mode 100644
index 0000000..e7a11a9
--- /dev/null
+++ b/crates/comet_sound/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/crates/comet_ui/Cargo.toml b/crates/comet_ui/Cargo.toml
new file mode 100644
index 0000000..860b35e
--- /dev/null
+++ b/crates/comet_ui/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "comet_ui"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/crates/comet_ui/src/lib.rs b/crates/comet_ui/src/lib.rs
new file mode 100644
index 0000000..b93cf3f
--- /dev/null
+++ b/crates/comet_ui/src/lib.rs
@@ -0,0 +1,14 @@
+pub fn add(left: u64, right: u64) -> u64 {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}