diff --git a/sandbox-templates/react-markdown-with-create-react-app/.stackblitzrc b/sandbox-templates/react-markdown-with-create-react-app/.stackblitzrc
new file mode 100644
index 0000000..cbbe389
--- /dev/null
+++ b/sandbox-templates/react-markdown-with-create-react-app/.stackblitzrc
@@ -0,0 +1,3 @@
+{
+  "startCommand": "npm start"
+}
diff --git a/sandbox-templates/react-markdown-with-create-react-app/sandbox.config.json b/sandbox-templates/react-markdown-with-create-react-app/sandbox.config.json
new file mode 100644
index 0000000..4842d64
--- /dev/null
+++ b/sandbox-templates/react-markdown-with-create-react-app/sandbox.config.json
@@ -0,0 +1,3 @@
+{
+  "startScript": "start"
+}
diff --git a/sandbox-templates/remark-rehype-with-parcel/.stackblitzrc b/sandbox-templates/remark-rehype-with-parcel/.stackblitzrc
new file mode 100644
index 0000000..cbbe389
--- /dev/null
+++ b/sandbox-templates/remark-rehype-with-parcel/.stackblitzrc
@@ -0,0 +1,3 @@
+{
+  "startCommand": "npm start"
+}
diff --git a/sandbox-templates/remark-rehype-with-parcel/sandbox.config.json b/sandbox-templates/remark-rehype-with-parcel/sandbox.config.json
new file mode 100644
index 0000000..4842d64
--- /dev/null
+++ b/sandbox-templates/remark-rehype-with-parcel/sandbox.config.json
@@ -0,0 +1,3 @@
+{
+  "startScript": "start"
+}
diff --git a/sandbox-templates/remark-with-parcel/.stackblitzrc b/sandbox-templates/remark-with-parcel/.stackblitzrc
new file mode 100644
index 0000000..cbbe389
--- /dev/null
+++ b/sandbox-templates/remark-with-parcel/.stackblitzrc
@@ -0,0 +1,3 @@
+{
+  "startCommand": "npm start"
+}
diff --git a/sandbox-templates/remark-with-parcel/sandbox.config.json b/sandbox-templates/remark-with-parcel/sandbox.config.json
new file mode 100644
index 0000000..4842d64
--- /dev/null
+++ b/sandbox-templates/remark-with-parcel/sandbox.config.json
@@ -0,0 +1,3 @@
+{
+  "startScript": "start"
+}